python : accept bytes as input to encode (#127)

Co-authored-by: deniz <[email protected]>

bindings/python/ggwave.pyx

@@ -25,7 +25,10 @@ def encode(payload, protocolId = 1, volume = 10, instance = None):
         @return Generated audio waveform bytes representing 16-bit signed integer samples.
     """
 
-    cdef bytes data_bytes = payload.encode()
+    if isinstance(payload, str):
+        payload = payload.encode('utf-8')
+    cdef bytes data_bytes = payload
+
     cdef char* cdata = data_bytes
 
     own = False